<http://schema.org/description>
"The CityVille forums are in a stir over some sneaky changes Zynga is slowly making to how expansions work in the game. Players are reporting that one moment the cost for an expansion was the normal"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2011/03/10/cityville-expansion-changes/19875760/>